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tout faire @met @ma WIN DOW-SASH ELEVATOBS.

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n To ALL' wnoM 1r MAY ooNcEnN:

B e it known that I, JOHN LE FERRE, of Charlestown, in the county of Middlesex, and State of Massachusetts, have invented certain improvements in Window-Sash Elevators, of which the following is a full, clear, and

exact description, reference being had to the accompanying drawings, makingpart of this specification.

Mypinvention consists in a plate permanently secured, by screwsl or otherwise, to the upper end of. either sash, and provided with screw-pins furnished with eyes, either sash being opened by pulling abord, one end of lwhich is secured to one of the eyes of the screw-pins, while tho othercnd of the cord is le'd over a pulley pivoted to a block, the upper end of which is provided with a screw-thread for securing it in placein the upper side of the window-frame, a cord being'also fastened to the other eye for the purpose of pulling the sash down.

To enable others skilled `in the art to understand and use my invention I will proceed to describe the manner in whichI have carriedit. out

In the said drawings, A is the window-frame, and B the sash, constructed in either of the ways shown in i Figure 1. To the cross-bar, at the upper` end ofthe sash, is screwed a plate, C, of the formsshown in Figure 4.

The plate shown in fig. 4 is bent around to form an elbow, the two portions, a and b, of the plate being at right angles to each other, the portion a being secured to the front of the upper end of the sash, while that, is secured to the under side of the same. Each plate, C, is provided with holes forthepassageof two pins,pe d, `one of the ends of each, of which is provided with o; screw-thread,f, while the othervendis bent around to form a hollow ring or eye, g, to which to attach the cords D E, that, D, leading upwardiover a pulley, F, which turns freelyin a block, G, the upper end ofwhich is provided Vwith a screw-thread, z., by which it is secured to the underside of the window-frame, the oord D leading. down within reach of the party desirous of raising the window-sash. The cord E leads directly down from its eye, g, and is also within reach when the window-sash is upland requirespulling down. The eyes'rg, to which to attach the cords D'E, maybe formed on the plate C itself, and instead of two eyes one only may be used, to which both cords may .be attached.

The construetionlof the parts, as herein shown and descrbed, ismore simple, `as it dispenses with the hinges t and use of one plate, and as it can be permanently attached to the sashthe inconvenience, of the clampingscrew is avoided. The ungularvplates -that are secured to the sash will prevent the splitting thereof, and prevent the plate itself frouibeing loosened by the ordinary wear and'jostle in elevating the window. In using la simple plate on-the face of the sash, instead of the angular plate, the strain in elevating the window would be directly on the wood of the sash, which is usually ot' light materiah'and the screws would Vsoon become loose and split the'sash, whereas in the mode herein described the strain is brought to the under 'edge of the sash andthe dii culties thereby obviated. Y

. Y 01am The arrangement of the angular plates C and screws f, provided with loopsgrin combinatiouwith the pulley F and blockG, connected to the window-frame, and operated by the cord D,.in the manner and for the purposes specified.

vhJOHN LE FERRE.

niark. Y

Witnesses:

P. E. TEseHEMAonEn, N. W. SrsAENs. 

